import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:mslocator/mslocator.dart';
import 'package:permission_handler/permission_handler.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  final _mslocatorPlugin = Mslocator();

  @override
  void initState() {
    super.initState();
    initPlatformState();
    getPosition();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    // We also handle the message potentially returning null.
    try {
      platformVersion = await _mslocatorPlugin.getPlatformVersion() ??
          'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  Future<void> getPosition() async {
    var status = await checkPermission();
    String? p;
    Timer? t;
    if (status) {
      p = await _mslocatorPlugin.getLastKnownPosition();
      debugPrint("获取位置：${p}");
      if (p == null) {
        t = Timer.periodic(
          const Duration(seconds: 1),
          (timer) async {
            p = await _mslocatorPlugin.getLastKnownPosition();
            if (p != null) {
              debugPrint("获取位置-1111：$p");
              t?.cancel();
            }
          },
        );
      }
    }
  }

  Future<bool> checkPermission() async {
    var status = await Permission.location.status;
    debugPrint("checkPermission: $status");
    if (status.isGranted) {
      // 确认授权
      return true;
    } else if (status.isPermanentlyDenied) {
      // 永久拒绝
      return false;
    } else {
      // 请求权限
      return await requestPermission();
    }
  }

  Future<bool> requestPermission() async {
    var status = await Permission.location.request();
    if (status.isGranted) {
      return true;
    } else if (status.isDenied || status.isPermanentlyDenied) {
      return false;
    }
    return false;
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Text('Running on: $_platformVersion\n'),
        ),
      ),
    );
  }
}
